High 7.5Published Sep 29, 2021

CVE-2021-22946A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSES…

Updated under an hour ago (2026-10-19 05:50 UTC)

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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 31 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

Exploited in the last 30 days

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-325, CWE-319
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: hackerone
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
haxx curl haxx:curl	from 7.20.0 before 7.79.0	NVD
debian debian_linux debian:debian_linux	9.0; 10.0; 11.0	NVD
fedoraproject fedora fedoraproject:fedora	33; 35	NVD
netapp cloud_backup netapp:cloud_backup	all versions	NVD
netapp clustered_data_ontap netapp:clustered_data_ontap	all versions	NVD
netapp oncommand_insight netapp:oncommand_insight	all versions	NVD
netapp oncommand_workflow_automation netapp:oncommand_workflow_automation	all versions	NVD
netapp snapcenter netapp:snapcenter	all versions	NVD
netapp h300s_firmware netapp:h300s_firmware	all versions	NVD
netapp h500s_firmware netapp:h500s_firmware	all versions	NVD
netapp h700s_firmware netapp:h700s_firmware	all versions	NVD
netapp h300e_firmware netapp:h300e_firmware	all versions	NVD
netapp h500e_firmware netapp:h500e_firmware	all versions	NVD
netapp h700e_firmware netapp:h700e_firmware	all versions	NVD
netapp h410s_firmware netapp:h410s_firmware	all versions	NVD
netapp solidfire_baseboard_management_controller_firmware netapp:solidfire_baseboard_management_controller_firmware	all versions	NVD
oracle communications_cloud_native_core_binding_support_function oracle:communications_cloud_native_core_binding_support_function	1.11.0; 22.1.3	NVD
oracle communications_cloud_native_core_network_function_cloud_native_environment oracle:communications_cloud_native_core_network_function_cloud_native_environment	1.10.0	NVD
oracle communications_cloud_native_core_network_repository_function oracle:communications_cloud_native_core_network_repository_function	1.15.0; 1.15.1; 22.1.0; 22.2.0	NVD
oracle communications_cloud_native_core_network_slice_selection_function oracle:communications_cloud_native_core_network_slice_selection_function	1.8.0	NVD
oracle communications_cloud_native_core_service_communication_proxy oracle:communications_cloud_native_core_service_communication_proxy	1.15.0	NVD
oracle mysql_server oracle:mysql_server	from 5.7.0 through 5.7.35; from 8.0.0 through 8.0.26	NVD
oracle peoplesoft_enterprise_peopletools oracle:peoplesoft_enterprise_peopletools	8.57; 8.58; 8.59	NVD
apple macos apple:macos	before 12.3	NVD
siemens sinec_infrastructure_network_services siemens:sinec_infrastructure_network_services	before 1.0.1.1	NVD
oracle commerce_guided_search oracle:commerce_guided_search	11.3.2	NVD
oracle communications_cloud_native_core_console oracle:communications_cloud_native_core_console	22.2.0	NVD
oracle communications_cloud_native_core_security_edge_protection_proxy oracle:communications_cloud_native_core_security_edge_protection_proxy	22.1.1	NVD
splunk universal_forwarder splunk:universal_forwarder	from 8.2.0 before 8.2.12; from 9.0.0 before 9.0.6; 9.1.0	NVD

References

https://hackerone.com/reports/1334111exploit, issue-tracking, patch, third-party-advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlmailing-list, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/vendor-advisory, mailing-list, third-party-advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlpatch, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/vendor-advisory, mailing-list, third-party-advisory
https://www.oracle.com/security-alerts/cpujan2022.htmlthird-party-advisory
https://security.netapp.com/advisory/ntap-20211029-0003/third-party-advisory
https://security.netapp.com/advisory/ntap-20220121-0008/third-party-advisory
http://seclists.org/fulldisclosure/2022/Mar/29mailing-list, third-party-advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlpatch, third-party-advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfpatch, third-party-advisory
https://support.apple.com/kb/HT213183release-notes, third-party-advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlpatch, third-party-advisory
https://www.debian.org/security/2022/dsa-5197vendor-advisory, third-party-advisory
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlmailing-list, third-party-advisory
https://security.gentoo.org/glsa/202212-01vendor-advisory, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-146325.html
https://cert-portal.siemens.com/productcert/html/ssa-389290.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.